871865117 has 16 divisors (see below), whose sum is σ = 926916480. Its totient is φ = 818380992.

The previous prime is 871865101. The next prime is 871865143. The reversal of 871865117 is 711568178.

It is a cyclic number.

It is not a de Polignac number, because 871865117 - 2⁴ = 871865101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871865147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298259 + ... + 301167.

It is an arithmetic number, because the mean of its divisors is an integer number (57932280).

Almost surely, 2^871865117 is an apocalyptic number.

It is an amenable number.

871865117 is a deficient number, since it is larger than the sum of its proper divisors (55051363).

871865117 is a wasteful number, since it uses less digits than its factorization.

871865117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3172.

The product of its digits is 94080, while the sum is 44.

The square root of 871865117 is about 29527.3621747694. The cubic root of 871865117 is about 955.3219739810.

The spelling of 871865117 in words is "eight hundred seventy-one million, eight hundred sixty-five thousand, one hundred seventeen".